A version of the Python programming language
1
vote
1answer
31 views
How to update attributes of a shapefile using list values?
I am using an update cursor to update the attributes of a shapefile using values from a list. It seems very easy, but I couldn't make it run correctly. When I run the following code, it updates all ...
3
votes
0answers
35 views
Why are my raster mean and standard deviation -1?
I have a set of about 25 rasters whose descriptive statistics I have been examining. The data in the rasters were calculated in Python and the rasters were created using Python-GDAL.
In all but one ...
1
vote
0answers
31 views
Spatial Filter in Qgis Using Python
Is it possible to create buffer and get intersected features in Qgis using Python?
I did in ArcObjects.but i need the same in QGIS also.
Dim topo As ITopologicalOperator
topo = chkPoint
Dim sFc As ...
0
votes
0answers
25 views
How to create an array of points in ArcMap? [duplicate]
I have a master point in following projection system:
WGS_1984_UTM_Zone_45N
WKID: 32645 Authority: EPSG
Projection: Transverse_Mercator
False_Easting: 500000.0
False_Northing: 0.0
Central_Meridian: ...
1
vote
0answers
20 views
Convert List by Source to List by drawing order using arcpy
When I do some calculations, it results in adding a table to TOC which converts "List by drawing order" to "List by Source". I want to convert it back to "List by drawing order" using arcpy and I am ...
0
votes
1answer
27 views
Getting error in compiling make file for plugin build in qgis 1.8
I am using QGIS 1.8 for building plugin. For developing i am using following ref this link example. where in this step 6 where compile the makefile in OSGeo4W. gives error pyuic4:command not found. I ...
0
votes
2answers
35 views
Why is Shapely not installing correctly?
I am trying to run Shapely on a new machine, and tried both installing it from source, using the installer on its webpage, and using pip install shapely. Every reference I try to make from the library ...
0
votes
0answers
33 views
Export ArcGIS Model to Python - Iterate Rasters, Collect Values, Calculate Values
I want to batch process a large number of raster files, calculate some values and properties and export these to a .csv or .xls. I managed to get a good working model that does this perfectly.
...
1
vote
3answers
53 views
How to setup a debugger for QGIS Plugin development?
As the title of the question implies, I wish to know how to set up a QGIS Python Plugin Debugger so that I can develop plugins more efficiently.
Any information regarding this would be much ...
1
vote
1answer
47 views
Best Platform to develop QGIS Python Plugins
I am currently developing QGIS Python Plugins in a Windows 7 64-bit environment.
Having said this I am stumbling across various issues which from what I have been able to gather have a less tendency ...
1
vote
1answer
46 views
mosaic raster to file geodatabase yields missing raster sections
Since upgrading to ArcGIS 10.1 (SP 1) from 10.0, I've been encountering an issue when running the arcpy.MosaicToNewRaster_management() tool with output to a file geodatabase. I'm principally working ...
0
votes
1answer
55 views
Can an arcpy.da.SearchCursor be used on a dataset residing in a ParcelFabric?
I'm using ESRI's LocalGovernmentMI.gdb data model and am managaing parcel data in a ParcelFabric dataset. I'm trying to use a search cursor on the ParcelFabric_Parcels dataset but I recieve this ...
...
2
votes
2answers
77 views
Run Python child script using Python Add-In button class?
I have a Python script which I want to execute using Python Add-In button class. Right now, I am using following:
class child(object):
"""Implementation for Toolbar_addin.button2 (Button)"""
...
0
votes
1answer
33 views
How to use expression in QgsVectorlayer label by using python?
how to show the two field values as a label on features. I have done it for a field called "ErrorDescr" with this i need to show another field values. Other field is "MarkerId"
...
0
votes
1answer
34 views
UnboundLocalError: local variable referenced before assignment
I have following simple function to get percent values for different cover types from a raster. It gives me following error:
UnboundLocalError: local variable 'a' referenced before assignment
which ...
2
votes
1answer
34 views
Where can I find a python GDAL 1.8.0 package?
I have python 2.7.4 installed on my RHEL 5 machine along with gdal-devel-1.8.0 and gdal-1.8.0. I tried to install the GDAL 1.9.1 package available on python's page ...
2
votes
1answer
89 views
GDAL/Python: How do I get coordinate system name from SpatialReference?
In Python, using GDAL, I've extracted a raster's projection as a WKT string as follows:
wkt = dataset.GetProjection()
# wkt is ...
2
votes
1answer
91 views
Quick way to make a convex hull
I am using Python and ArcGIS 10.1.
Is there a function or very quick way to extract points out of point feature class into an array without looping through a search cursor (as I have millions of ...
0
votes
1answer
37 views
Running a script with QgsFeature from within the console
I am trying to run a script from the QGis Python console (similar to: http://spatialgalaxy.net/2012/01/27/qgis-running-scripts-in-the-python-console/)
The line feat=QgsFeature() operates fine from ...
2
votes
2answers
105 views
Help with Python and adding a grouplayer to arc, renaming it from a folder name, then adding layers to it from that folder
I am trying to use os.walk to go through a directory tree, pull out all the .shp files in it, create a grouplayer in the mxd, rename the grouplayer the folder name, then add the layers from that ...
1
vote
1answer
58 views
Make Table View with field_info Output
I am using Make Table View to copy data from one table to a table view object and in the process hide and/or rename some fields. When I output the data to a dbf it hides and/or renames the fields ...
0
votes
1answer
89 views
Dissolving shapefile python script not working, syntax help please
I do not understand why this simple script won't work. I can get it to dissolve in model builder but not from a script that I run from inside the map document. My output results are 4 polygons, just ...
2
votes
0answers
72 views
Python Script that calls the Voronoi Polygons Function?
I've been looking to see if there was a way to call Voronoi Polygons function found in Vector/Geometry Tools, directly from the code but I have not found one. Does this currently exist? Is there a way ...
1
vote
1answer
136 views
QGIS python location problem
It seems that MacPorts installs Python27 in /opt/local, but that MacPorts QGIS updates and uses the Apple Python27 in /Library. The result is that MacPorts additions to Python27 such as OpenCV don't ...
0
votes
0answers
101 views
ArcMap runs custom script once and then it crashes on second run
So I made a script that takes data from an MSSQL database and inserts it into a featureclass. I added the script to a toolbox and am able to run the tool from within ArcMap 10.1. The problem is that ...
0
votes
0answers
35 views
How do I get XYtools to work in OS X 10.8
This is the first question I have asked here so I hope I am not asking in the wrong place. I have an installation of qgis (1.8 lisboa) and I want to use the XYTools python plugin.
I have installed ...
0
votes
3answers
36 views
Using Sort_Management for multiple tables
I like to convert tables (100+) living in access database to a geodatabase tables, sorting them and deleting unnecessary fields in each table at the same time. I figured I use the Sort_management ...
2
votes
1answer
146 views
Convex Quadrilateral Polygons subdivision in equal parts using Python / OGR
Consider an irregular polygon (P) which has four vertices.
I would like to subdivide P into smaller polygons as shown here http://i.stack.imgur.com/4SKhB.jpg
In the old days I was using ArcGIS 9.3 ...
4
votes
1answer
133 views
Personal shell launcher for PyQGIS
I have changed a shell launcher found at http://inasafe.linfiniti.com/html/id/developer-docs/platform_windows.html as to fit my wish: setting the system environment variables to be able to use PyQGIS ...
3
votes
2answers
115 views
Concatenate only when all fields to be concatenated have values
I have two fields that I want to concatenate. Field1 contains null values and Field2 has values for every record. I want to concatenate only when both fields have values. I tried using a function ...
3
votes
0answers
92 views
How do I write XML metadata with Python?
Some Python software I have written generates raster files via GDAL. I would like the software to create an XML metadata file for each raster so that I can include details about how the raster was ...
0
votes
1answer
104 views
Using macports python 2.7 with macports qgis
I installed qgis through macports on my mac running OSX 10.8.2 but when I run the application (qgis 1.8) it says that I don't have python-gdal installed.
I searched google and it appears that it is ...
1
vote
0answers
83 views
How to draw nodes of a graph in Python and link them to a table?
I would like to draw some points with a Python GUI, like a graph, and link those points to a table.
0
votes
1answer
49 views
gdalwarp cant find libproj.dlib
Thought I had finally got Python, gdal and QGIS to play nicely together but just tried to do a batch transform using a bash script to call gdalwarp and it claimed it couldn't read the libproj.dlib ...
3
votes
1answer
218 views
Import functions in python Add-In logic script
I am running into an error. I have a set of functions which I want to import in the python Add-In script at the time of execution, but when I built Add-In with "import stats" line then tools are ...
2
votes
1answer
61 views
How to declare folder name as global?
I have asked similar question at stackoverflow but posting here as well since it involves ArcGIS and python Add-In. Following code shows first step where i have to declare output folder as global so ...
3
votes
2answers
379 views
Read specific column and row value from a text file using Python [closed]
I have a text file as following:
1.25 177.
1.50 220.
2.00 272.
5.00 427.
10.00 556.
25.00 763.
50.00 916. ...
1
vote
0answers
139 views
DLL problem with PyQGIS
I am having problems with Python Shell importing the module "qgis.core".
When I type "import qgis.core" the Shell ("idle.pyw") gives me this error:
Traceback (most recent call last):
File ...
2
votes
2answers
457 views
Combining Python and QGIS out of console
I was wondering if it's possible to use Python and QGIS out of QGIS environment (namely, avoiding the use of the console). I'm pretty new to QGIS, I've been always using ArcGIS 10.1. What I am looking ...
3
votes
1answer
463 views
How can I Setup Python to recognize QGIS
I want to use QGIS and work with Python out of the console, but I'm having troubles letting the system recognize the paths of some DLLs.
Since I couldn't find a good answer on the web, I wonder if I ...
0
votes
0answers
40 views
Use Overviews to Select Area of Interest in Very Large GIS Rasters/Images (e.g., GeoTiff's)
I am working with large images in Python and Gdal on a Windows machine and wondering if it is possible to directly access the specific smaller overviews I built into them using gdladdo. I am viewing ...
4
votes
1answer
201 views
Efficient computation of nearest distance for each point to closest polygon
I'm looking for a more efficient way to compute the nearest distance between features from 2 layers, in this example for each point the nearest distance to the closest polygon. Is there a more ...
1
vote
1answer
130 views
OGR Python bindings
When I try to access one of the GRASS vector files through Python OGR bindings, it gives error:
Here is the script code in Python 2.7.3 IDLE (GUI) in Windows 7.
from osgeo import ogr
ds = ...
5
votes
2answers
209 views
Calling GRASS functions from external Python
I have GRASS 6.4.3svn installed in my machine running Windows 7. Also in my machine i installed Python 2.7.3 for Windows.Now i need to call GRASS libraries from Python and not within the Python shell ...
0
votes
2answers
85 views
How to parse fields values using ArcView 10.0 scripting
I am using 10.0 ArcView and am trying to get the "R" in R12345678910 to drop. I lost all my scripts I've saved and appreciate some assistance.
The numbers are in a column in the attribute table and ...
3
votes
2answers
285 views
How to draw rectangle to clip layers using python addin in ArcGIS 10.1?
I want to clip rasters in data view using interactive rectangle (to define Area of Interest) and add them to current dataframe. Following is a piece of code which is not returning anything. Any ...
0
votes
0answers
34 views
QGIS Plugin delete QGSVertex from map canvas
i'm developing a qgis plugin and i need to add a function to delete previous drawn vertexes on map canvas.
On my dialog class, i can draw vertexes and when i draw one i'm also adding it to a list, so ...
3
votes
1answer
160 views
Pasing multivalue parameter using arcpy
I am trying to get my head around how multivalues derived from the arcpy command GetParameterAsText gets looped through a script. Could some please provide a sample script that does the follow basic ...
2
votes
2answers
84 views
Invalid Username When Developing a QGIS Plugin on Mac
On a fresh Mac OSX 10.8 install, I've installed Quantum GIS from Kingchaos binaries and it's running fine. I'm trying to develop a plugin for QGIS using Plugin Builder. The skel that Plugin Builder ...
0
votes
1answer
203 views
zonal histogram fails to create output table when looping
Using python I'm having problems when trying to attempt a FOR LOOP with the ZonalHistogram function of ArcGIS 10.1. It works fine if I use it only for one image but it gives me this error while for ...
